Back-to-Back Mezzanine Header Connector Design
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Solution Overview
Problem
Existing mezzanine connectors face challenges with high real estate requirements, limited contact density, complex manufacturing, and signal performance limitations due to the use of deflectable spring beams and tight contact spacing.
Innovation Solution
A modular mezzanine header connector design featuring back-to-back contact modules with dielectric holders and header contacts that provide scalable stack height, electrical shielding, and adjustable impedance, using a conductive housing frame to enhance signal integrity and simplify assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deflectable spring beams are used at the separable mating interface, then reliable electrical connection is achieved, but significant real estate and space are required due to long beam lengths
Solution Approach 1:
The connector is divided into two separate components: a rigid header portion mounted to the first circuit board and a receptacle portion mounted to the second circuit board. This segmentation eliminates the need for long deflectable spring beams, as each portion can be optimized independently for its specific function while reducing overall space requirements.
Solution Approach 2:
The design transitions from a single-plane spring beam structure to a three-dimensional arrangement where the header and receptacle portions mate at an interface. This dimensional change allows for more efficient space utilization by distributing the connection function across multiple spatial dimensions rather than relying on long linear beam extensions.
2Ease of operation
If spring beams are used for separable mating interface, then mechanical engagement is achieved, but contact density is limited due to required beam lengths
Solution Approach 1:
By segmenting the connector into header and receptacle portions with a defined separable mating interface, the design enables mechanical engagement through precise alignment and insertion rather than relying on long spring beams. This segmentation allows contacts to be positioned more densely since each portion can be optimized for its specific mounting and engagement requirements.
3Reliability
If two mezzanine connectors are used mounted to different circuit boards, then connection is achieved, but system complexity and manufacturing difficulty increase
Solution Approach 1:
The invention merges the functions of two separate mezzanine connectors into a single integrated system where the header portion and receptacle portion work together as a coordinated pair. This merging reduces system complexity by eliminating the need for two independent connector assemblies, reducing the number of individual contacts to load, and simplifying the overall manufacturing process while maintaining reliable electrical connection.
4Area of stationary object
If tight spacing of contacts is used in mezzanine connectors, then space efficiency is improved, but signal performance limits are suffered
Solution Approach 1:
The design uses three-dimensional positioning of contacts within the header and receptacle portions, allowing for optimized signal paths and spacing in multiple dimensions. This enables tight overall packaging while maintaining adequate signal performance through vertical and lateral separation strategies rather than being constrained to a single linear spacing dimension.
Data Source
AI summary
A mezzanine header connector includes a contact assembly having a pair of contact modules arranged back-to-back. The contact modules each have a dielectric holder holding a plurality of header contacts. The dielectric holder extends between a mating end and a mounting end and has an inner side and an outer side. The header contacts have mating segments exposed along the outer side at the mating end for termination to corresponding receptacle contacts of a mezzanine receptacle connector. The header contacts have terminating segments extending from the mounting end of the dielectric holder for termination to a circuit board. Each of the header contacts extend along a linear path between the corresponding mating segment and the corresponding terminating segment. The inner sides of the dielectric holders of the pair of contact modules abut against each other such that the header contacts face away from each other.